Hi everyone. I'm new here. I bought a GTX 780M from eurocom. I have no knowledge about the insides of the R3 and was afraid to do it myself. I live in Thailand and there is only one (ex-tech) guy I know that used to work on Alienware so I took it to him for help. I followed the installation procedure provided here and it happened to work fine. Until that night that the screen starts to blink on and off several times, and then it went black. I restarted, the screen was not turned on, no POST and the laptop produced 8 beeps, indicating LCD failure. Today I took it to the same guy. He swapped the 780M with my old 580M and it worked, so it's not the LCD. Then he swapped back the 780M, no POST, but now with 6 beeps, GPU failure. Then he swapped the 780M to his own R3 (with A10 BIOS), POST, booted perfectly fine. But on my R3 was still 6 beeps. We really had no idea of what was going on and the guy refused to help me any further since he is now a very busy man, so I'm on my own from now. Right now I'm running on my old GTX 580M. Please help me out, I don't know what to do anymore. Thank you.